(rec.audio.misc) Intended to be a catch-all for any any all posts that might not fit into one of the existing audio groups.
Basically, anything that is audio-related and doesn't belong somewhere
else is fair game.Threads: 2,838 Posts: 14,628

(rec.audio.high-end) Within the realm of high-end audio, any topic is permitted. Theories, opinions, and questions are all
appropriate if they are concerned with the reproduction of music.Threads: 4,073 Posts: 40,883

(rec.audio.tech) A place for users to post concerning home consumer audio that are of a factual, practical, or theoretical
nature. Sample topics might include: "How do I compute standing wave frequencies?" or "Ported vs. non-ported speaker designs"Threads: 7,656 Posts: 80,347

(rec.audio.pro) A forum for the discussion of professional audio products, recording and studio engineering as it relates to any
of following:- radio/tv audio for on-air and production, sound reinforcement &
recording.Threads: 39,280 Posts: 402,046

(rec.audio.marketplace) This forum is a place for users to post forsale and wanted articles of audio equipment that you wish to buy or sell. Note this is the *ONLY* place to advertise.Threads: 16,995 Posts: 26,687